In reply to the bolded part. I don't say that it's similar to the ridiculous RvP/Falcao/Rooney situation, because the squad is naturally more balanced now than it was then, and Zlatan is a target man who can create and score.
I'm not even against signing him (I said about 30 pages back that he could have that Cantona type effect). I'm only against signing him if he's the only striker we intend to sign. In other words, he's good (sometimes great), but he's very old for a striker. We shouldn't throw all our eggs in one basket here.
As for the PSG thing. Maybe, but it seems to me like PSG would have put up a bit more fight if they really, really wanted to keep him. Their squad is insanely good, so perhaps he's a player they can afford to jettison.